# Re-engage event participants from HubSpot with Gemini: n8n workflow

> Started by an event in a connected app, and works across Email and Slack. It hands the judgement calls to Gemini.

Source: https://millionrounds.com/workflow/re-engage-event-participants-from-hubspot-with-gemini (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Lead generation](https://millionrounds.com/workflows?category=Lead+generation#library)

# Re-engage event participants from HubSpot with Gemini

Started by an event in a connected app, and works across Email and Slack. It hands the judgement calls to Gemini. 11 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: Gemini

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fre-engage-event-participants-from-hubspot-with-gemini)

**11 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**2** Services it connects to

## The flow

Starts it 1 Model 2 Logic 5 Service 3

The steps in the order they run, from what starts it.

- 1 **Start Alumni Campaign** Manual trigger *Starts it*
- 2 **Google Gemini for Alumni** Lm Chat Google Gemini *Model*
- 3 **Set Campaign Config** Set *Logic*
- 4 **Generate Personalized Email with Gemini** Information Extractor *Model*
- 5 **Fetch Past Attendees from HubSpot** Http Request *Service*
- 6 **Send Alumni Email** Email Send *Service*
- 7 **Filter Already Registered** Code *Logic*
- 8 **Log Alumni Outreach** Code *Logic*
- 9 **Has Eligible Alumni?** If *Logic*
- 10 **Post Campaign Summary to Slack** Slack *Service*
- 11 **Segment Alumni by Engagement** Code *Logic*

## How it's built

- **Starts on:** An event in a connected app
- **Steps:** 11, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Email, Slack
- **Model:** Gemini

## Questions

What does it need to run?

An n8n account, plus your own Email and Slack accounts, and a key for Gemini. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an event in a connected app.

Does it use AI?

Yes. It calls Gemini. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 11 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 11 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fre-engage-event-participants-from-hubspot-with-gemini)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Email](https://millionrounds.com/workflows?service=Email#library)[Slack](https://millionrounds.com/workflows?service=Slack#library)

## Workflows like it

Also lead generation, with the same services where possible, closest in size first.

- [**Automated sales leaderboard with HighLevel CRM and OpenAI** 11 steps · calls a model · GoHighLevel, Google Sheets](https://millionrounds.com/workflow/automated-sales-leaderboard-with-highlevel-crm-and-openai)
- [**Lead email follow up with OpenAI and Airtable** 11 steps · calls a model · Airtable, Gmail](https://millionrounds.com/workflow/lead-email-follow-up-with-openai-and-airtable)
- [**Lead qualification and scoring with Jotform and Gemini** 11 steps · calls a model · Gmail, Slack](https://millionrounds.com/workflow/lead-qualification-and-scoring-with-jotform-and-gemini)
- [**Re-engage HubSpot leads with Azure OpenAI GPT-4o and Gmail** 11 steps · calls a model · Gmail, HubSpot](https://millionrounds.com/workflow/re-engage-hubspot-leads-with-azure-openai-gpt-4o-and-gmail)
- [**Score and route Facebook Marketplace leads with OpenAI** 11 steps · calls a model · Slack, Supabase](https://millionrounds.com/workflow/score-and-route-facebook-marketplace-leads-with-openai)
- [**Score and route GoHighLevel leads with Claude and Slack** 11 steps · calls a model · Google Sheets, Slack](https://millionrounds.com/workflow/score-and-route-gohighlevel-leads-with-claude-and-slack)